Safety Rail Source® has developed a portable 'railings on a cart' system that is perfect for easily transporting rails and bases wherever needed on the rooftop, grounds and facilities. It holds 11 rails of any size, and 12 bases (rails and bases purchased separately). NextGen 3000™ Universal Railing is used to protect workers from falling off a roof or to protect machinery, open holes and to restrict access to danger zones. Click Here to purchase Rails and Bases for Kart. Note: Toe Boards are also available.